The creator of Unsolved Mysteries says the the show has received hundreds of tip-offs about the whereabouts of escaped killer Lester Eubanks. You can watch a trailer for the show here:
Eubanks was convicted of the attempted rape and murder of 14-year-old Mary Ellen Deener in Ohio in November 1965.
Eubanks was sentenced to the death penalty, but this was commuted to life in prison without parole in 1972.
However, the following Christmas, officers allowed him to shop unescorted as a reward for good behaviour, at which point he absconded. Police have been trying to track him down ever since.
Deputy US Marshal David Siler, who has worked the case since January 2016, said: "I think about this case every day and the little girl who was killed.
"In law enforcement, there are cases that keep you up at night; this is one of those cases."
But after almost 50 years of searching, police feel like they are finally closing in on the 75-year-old and have upped the reward for information leading to his arrest from $25,000 (£19,157) to $50,000 (£38,314).
US Marshal Brian Fitzgibbon told USA Today last week: "He's alive. I feel we're getting closer.
"There's nothing putting him in a place. We're looking for any information to his life on the run or the history of his life on the run."
The National Center for Missing and Exploited Children (NCMEC) has also employed its Forensic Imaging Unit to construct age-enhanced images of Eubanks in a bid to catch the fugitive.
US Marshal for Northern Ohio Peter Elliott said: "The technology and the talent of the artists has created a likeness that will hopefully bridge the gap in time that will enable a Facebook user or an Instagram follower to identify this child killer.
"This pencil-to-paper approach helps humanise a photograph that takes him from escapee to old-man."
After the first volume of Unsolved Mysteries was released on Netflix in the summer, Dunn Meurer said they received more than 1,500 tips, with around 50 deemed credible and passed on to authorities.
Speaking about the making of the show, Dunn Meurer and co-creator John Cosgrove - both of whom worked on the original series between 1987-2010, as well as the reboot - said: "The hardest part of our job was selecting only four stories for each episode.
"There are an overwhelming number of unsolved mysteries in the world, and we wish we could solve them all."
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